Timing Reference - Why do I get two impulses?

C

Calypso

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While trying to run measurements using one speaker as a timing reference, it appears that there is a second impulse being generated. Is this a setting or incorrect setup?
TwoImpluses.jpg
 
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John Mulcahy

John Mulcahy

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Either both speakers are playing the measurement sweep or there is a very strong reflection.
 
C

Calypso

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John Mulcahy said:
Either both speakers are playing the measurement sweep or there is a very strong reflection.
Click to expand...
Tracked it down to a reflection. Thanks. Used pillows behind the mic, remeasured, and voila.
 
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darklight

darklight

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Sherbourn 5/1500A
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Definitive Technology BP2002TL
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CLR 2002
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BPX2
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BenQ MH530 FHD
FargateOne

FargateOne

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Rotel RSX-1562
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B&W 804 D2
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B&W HTM4D2
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One way I used is to put a narrow panel of a certain dimension (a cushion a pillow a small board) to block the signal in one direction (front left right side of the speaker then measure. If reflexion desappeared you know where to search. The othe way is more complicated and implies to find in the impulse measurement the time by which the reflexions is delayed and use the "wrope technique" to find it. But my english is too poor to explain it to you here. One here will do better.
 
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